If you are going to advertise people to subscribed to a channel for SupreMacy updates I would have to recommended creating a new separate channel for SupreMacy and maybe Brawl modding in general. People, or at least I for one, like to only subscribe to channels where the majority of content interest me. And I see you have Let's Play videos on your channel; Let's Plays make for a lot of videos but the type of content they provided are very different from modding videos. There is overlap yes, but that outside that overlap is great disinterest. Also take all this with a grain of salt as I tend to be nitpicking if I am aware of something but cannot ignore it.

As for SupreMacy itself. Interesting concept so far. I am waiting for a demo though to really feel how it will play.